Method of spinning stepped flanges and apparatus therefor



March 31. 1925. 1,531,426

- F. STRUCHEN METHOD OF SPINNING STEPPED FLANGES AND APPARATUS THEREFORFiled April 7, 1924 quent operation.

Patented Mar. 31, 1925.

UNITED STATES PATENT OFFICE.

FRED STRUQHEN, OF ERIE, PENNSYLVANIA.

METHOD OF SPINNING STEPPED FLANGES AND APPARATUS THEREFOR.

Application filed April 7,

To all whom it may concern:

Be it known that I, FRED STRUOHEN, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented new and useful Improvements in Methods of Spinning SteppedFlanges and Apparatus Therefor, of which the following is aspecification.

The invention is designed to facilitate the forming of receptacleshaving stepped flanges. Ordinarily this is accomplished by a stampingoperation, the initial flange being formed in one stamping operation andthe stepped flange being formed in a subse- Ordinarily the flange isthen trimmed and beaded by a spinning operation.

With my method and apparatus one flange is formed by stamping with thereceptacle and the stepped flange is formed by spinning so that thetrimming, offset flanging and beading may be done in a sequence ofoperations on the spinning machine, thus reducing the operations and thetime and expense in forming such offset flanges. Features and details ofthe invention will appear from the specification and claims.

The apparatus forming the subject-matter of the invention and by whichthe method may be practiced is shown in the accompanying drawings asfollows a Fig. 1 shows a plan view of the spinnin machine.

Fig. 2 a cross section.

Fig. 3 a sectional view in perspective of the flanged receptacle as itcomes from. a stamping operation.

Fig. 4. a sectional view in perspective of the receptacle formed withthe stepped flange.

Fig. 5 a sectional view in perspective of the completed article.

Fig. 6 a plan view of the flange deflecting tool.

Fig. 7 a side elevation of the same.

Fig. 8 an end View of the tool.

1 marks the bed of the machine, 2 the spinning head spindle, 3 thespinning head, 4 the flanged article as it comes from the stampingoperation and as it is placed on the head, 5 the follower plate forholding the article on the spinning head, 6 the tail spindle for holdingthe head 5 in place. This apparatus is common with spinning tools.

A tool holding base 7 is mounted on the 1924:. Serial No. 704,895.

frame 1 and a swinging tool frame 8 is mounted on a pin 9 carried by thebase 7. A lever 10 is fulcrumed on a pin 11 on the base 7 and has a. pinand slot connection with the frame 8 whereby the frame may be swung tobring the tools into operative position with the fl'ange- 7 Cuttingdisks 13 are mounted on a post 13 at the rear end of the frame 8 and arebrought into cutting position with relation to the flange 4 in theinitial operation on the machine. This trimming is very rapidly done bythese disks-in fact, completed practically in a single rotation. Thestepped flange forming tool is then thrown into 0 era-tion. It comprisesa tool 14 pivotaly mounted on a pin 15, the pin being carried by abracket 15 on an adjustable base 15". The base 15 is adjustably mounted.The tool base 7 is adjustably mounted on the frame 8. The tool 14 isadapted to be swung by a lever 16, this lever being mounted on a pin 17.The pin 17 is secured in a post 18 and the lever is connected with thetool 14 by a pin and slot connection 19. By pulling SOv the lever upwith the frame in the position shown in Fig. 8 the front end of the toolis swung up into position to operate on the flange 4:.

After the forming of the stepped flange a bead is formed on the steppedflange by means of a beading wheel 20 mounted on the post 18. This isswung into operation as the tool 14: drops back from engaging positionby throwing the end of the lever 10 downwardly.

The effect of the stepped flanging tool on the flange 4 is to form anoffset step 21 with a flange 22 extending outwardly from the steppedportion 21, these parts being formed of the metal previously in theflange 4. The edge of the flange is beaded forming a bead" 23 as shownin Fig. 5 by the beaded wheel 20. I

The stepped flangeforming tool is shown in detail in Figs. 6, 7 and 8.It has the camming and deflecting surface 24 which engages the edge ofthe flange 45 crowds it over to the offset position, and into a slit 25which straightens up the deflected portion of metal to the plane of thefinal flange 22 and the end of the tool operating against theintervening metal between the base of the flange 4; and the metal of theflange 22 forms the step 21 through the spinning action of these twosurfaces. Thisitool spins downthe:metal'yery rapidly and leaves finishededge.

What I claim as new is 1. The method of forming stepped "flanged.througl1 the actionzof a camming and .de-

,fiectiii g surface fforced i-ntospinning rela- .t1 on .hy a thrustexerted in adirection .at .r ght angles .to the axis of the-(cylinder.

2. I111 eilnethiodof forming :step p e d flange-d cyhnd which consistsin ;rotating a flanged cylinder, trimming the flange ivvhile so rotatedspinning the flangezan'dstep by r gijng: opposite sides. 01f fthe flangeand "ting the. flange sidewise through the agctionof: a camming'; anddeflecting jsur-face ,forced into spinning relati0n:by-a thrustex-Vertedgin atdirection ,at right angles ItO the axis qoflthfe cylinder,saidytrinnning ,and spinning operations being successive but .Withiacontinuous rotation of the cylinder.

3. In' ti-spinning imachine, the combina- 1tion.offa ,head, avfiangedeflecting. and spinning tool in operative vrelation tothe headand having a z-fla-nge Ie'ceiving slit having walls adaptedtoxengageuopposi'ng surfaces ofagflangeand a flange deflecting surfaceleadingatoithe .slitanfd a step iorming face x1e ailing 1 vfrom;'the-1-Slit.

;;In--;a spinning machine, the combinamingvtool in operative relationrtowthenhead hingrtothesslit and 1 a-step forming face leading fromtheslit, and ,meansforinoving the tool @toward and from the. headicomprising a swinging mounting;

In a spln'ning anachine, the combina tion of a head, a. cuttenfforcutting vai'flanged cylinder gm ounted .onzth'e he ad; a flange spinning{tool .inoperativerelation to the head ha-f, n g a Jflange -re cei-ving.,s1it having Walls adapted to,1engage opposing .surtaces of a flange,anda flange deflecting'snrface leading ,to .the slitiand a step forming.face lead ing fronrthe slit. p

.7. In aspinning"machine,the zcembination of a head, a cutter forcutting a-fianged cylindermounted onthe :head, a flangespim .ning.toollin operative relation ate the head having a-Vflange .receivingslitliaving-walls adapted to (engage opposing sufitaees-ofa flange, a flangedeflecting -suri"ace-::leadingato the slit and a :step -.for1nin-gw face--leading {from :the slit, and means cperatingthe cutter andsstcpflange'zformingitcolwin sequence.

In testimony \iiheireoff :I' hae exincreuirtio set my hand. p

SEDRU.

